import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 洪汤泽大帅哥
 * Date: 2024-11-17
 * Time: 19:58
 */
public class Main {

    public static String toLowerCase(String s) {
        return s.toLowerCase();
    }

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String string = sc.next();
        System.out.println(toLowerCase(string));
    }
}
